hypochlorite leaching of gold ore

hypochlorite leaching of gold ore

In this research, oxidation of sulfide minerals and leaching of gold from a gold-bearing sulfide concentrate using chloride-hypochlorite solution was investigated. The effects of calcium hypochlorite concentration, sodium chloride concentration and initial pH of leachant on

pyrite were the main minerals present on the concentrate. The best results for gold extraction were obtained with oxy- gen pressure of 80 psi, 10% (w/w) sodium hypochlorite, temperature of 80˚C, at pH = 13, and a constant stirring speed of 600 rpm. These conditions allowed an approximated 60% of gold and 90% of silver extractions in 1 hr.

gold leaching with hypochlorite [ 4.9 6783 Ratings ] The Gulin product line, consisting of more than 30 machines, sets the standard for our industry. How to Use Bleach on Gold Ore to Remove Gold eHow. How to Use Bleach on Gold Ore to Remove Gold. Gold is an almost non-reactive metal, but halogens chlorine, bromine, fluorine and iodine

Jul 16, 2018· An oxide gold ore was subjected to chloride/hypochlorite leaching at room temperature. . maximum gold recovery of 58% compared to sodium hypochlorite. .. Although cyanide is used commercially for the extraction of gold,.

An oxide gold ore from Placer, Surigao Del Norte was subjected to chloride-hypochlorite and cyanide leaching at room temperature at 3 different hours 4 hours, 12 hours and 24 hours. This project characterized the ore used and assessed the effects

Mintek has developed a process called iGoli Mercury-free Gold Extraction Process that can be used to extract gold from 0.1 % gold concentrate to produce 99.90 percent gold product. The process uses a mixture of pool acid (dilute hydrochloric acid), bleach (sodium hypochlorite) and sodium metabisulphate to leach and recover gold.

Laboratory leaching experiments were conducted to ascertain the effectiveness of sodium hypochlorite solution, NaOCl, as a pretreatment for oxidizing the carbonaceous matter and dissolving gold from finely disseminated gold ores.

The leaching kinetics of an oxide gold ore with iodide Download citation The leaching kinetic Two types of gold ores were subjected to iodide/iodine leaching at room temperature. The effects of three factors, including ore type (a carbonaceous and an oxide gold ores), iodide/iodine concentration, and the presence of oxygen in solution on gold

HYPOCHLORITE LEACHING OF GOLD ORE W.T.Yen, R.A.Pindred and M.P.Lam Mining Engineering, Queen's University Kingston, Ontario, Canada K7L 3N6 ABSTRACT Cyanide is a conventional lixiviant for gold extraction but its' toxicity is a major concern for the environmentalist There are

In the leaching reactor 40, the ore is slurried with the brine from the brine reservoir 10, acidified with sulphuric acid or hydrochloric acid and contacted with halogens liberated from the hypochlorite generated in the diaphragm-less electrolytic cell 20.

Gold extraction was shown to be dependent on sodium hypochlorite concentration, heap leach flowrate, temperature and leaching time or bed volumes. Optimum leaching conditions were 10°C and below utilizing a 1.0 percent sodium hypochlorite solution at a flowrate of 15 gal/ft2 day or greater for 2 to 13 bed volumes depending on the effluent hypochlorlte pH and ore type.

Grind the ore so that all parts of the ore are open to the HCL mixture. Add your ore to a plastic-tub ore mixer along with 10 pounds of river rock and turn the mixer until the ore is 200 mesh or more. 200 mesh means there are at least 200 particles in one square inch of ore.

An oxide gold ore was subjected to chloride/hypochlorite leaching at room temperature. The effects of three factors, including Ca(OCl) 2 vs. NaOCl, OCl concentration, and HCl concentration on gold leaching performance were investigated.

Hypochlorite Leaching of Gold Ore 911metallurgist. In a leach solution containing 20 % HCl and 20 g/L NaCl, 97 % of the gold was extracted in 6 hours with 90 kg/t available chlorine and 95 % of the gold was extracted in 18 hours with 45 kg/t available chlorine. Chat;

hypochlorite leaching of gold ore Download as PDF InTechFeb 1, 2012 The poor extraction of refractory gold ores is an old and still existing problem Oxidation of . More Products; Leaching of an oxide gold ore with chloride/hypochlorite ,

The method of chloride-hypochlorite leaching has the advantages of short process, low pollution and higher in reaction rate compared with the traditional leaching method. In this research, NaCl NaClO solution is used to leaching gold from a refractory gold concentrate, and the influence of NaCl and NaClO concentration, reaction time to the leaching rate were investigated in this experiment.

An oxide gold ore was subjected to chloride/hypochlorite leaching at room temperature. The effects of three factors, including Ca(OCl) 2 vs. NaOCl, OCl concentration, and HCl concentration on gold leaching performance were investigated.

An oxide gold ore was subjected to chloride/hypochlorite leaching at room temperature. The effects of three factors, including Ca(OCl) 2 vs. NaOCl, OCl concentration, and HCl concentration on gold leaching performance were investigated.